# Task Rainbow vs Core

Task Rainbow and Core are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Task Rainbow sells 2 in-app purchases, starting at $2.99 per month and Core sells 2 in-app purchases, starting at $6.99 per month. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | Task Rainbow | Core |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | — |
| Monetization | — | Freemium |
| Size | 85 MB | 11 MB |
| Requires iOS | 18.5 | **17.0** |
| Devices | iPhone, iPad | **iPhone, iPad, Mac** |
| Age rating | 4+ | 12+ |
| Developer | [Toshiaki Nakamura](https://appshunter.io/developer/822485897) | [Hukido](https://appshunter.io/developer/1890385165) |

## What reviewers say

### Task Rainbow

[App page](https://appshunter.io/ios/app/task-rainbow-time-tracker/id6745430170)

**Features:** macOS Compatibility, Vision Pro support, iPhone Duo support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium 1 month | $2.99 | per month |
| Premium 1 year | $19.99 | per year |


### Core

[App page](https://appshunter.io/ios/app/core-ai-writing-studio/id6761600363)

This writing application is designed for serious Japanese writers, offering vertical text, manuscript management, and AI-powered editing and research. It syncs seamlessly with its Mac counterpart, allowing for on-the-go work with reliable source citation.

**Highlights:** AI editing partner, AI research with real sources, Vertical and horizontal text layout, Export to multiple formats (PDF, DOCX, EPUB), Project management (corkboard, outliner), Syncs with Mac version, Quick notes via widget

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro | $6.99 | per month |
| Max | $24.99 | per month |


## Frequently asked questions

### Is Task Rainbow free?

Task Rainbow is free to download, with in-app purchases available.

### Is Core free?

Core is free to download, with in-app purchases available.

### Do Task Rainbow or Core have ads?

Neither Task Rainbow nor Core shows ads.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*